I have been working on an ASP.NET project for months now without issue. Recently my computer crashed mid compile and now when I load and run the project I get 'Could not load file or assembly 'Ionic.Zip' or one of its dependencies.'
Thinking it was an issue with that particular DLL, I removed it as a test only to have the project say it could not load another referenced DLL, etc etc, until I had no references left...
Any ideas?
If nothing in the code has changed. "Build->Rebuild Solution" should do the trick (implicitly cleans and builds).
If this does not work, do "Build->Clean solution" and go delete all generated build folders (default bin and obj folders). And then try build and run.
And if it still does not work, the code has changed and dependencies are really missing.
Using NuGet and packages are missing perhaps?
I tried everything but NuGet, I didn't use it to get any of the references before.
In the end I had to check in all my changes to TFS, delete the project from my workspace and computer, and then reload it from TFS. Seems to have worked. Something must have been damaged in the project file.
Related
Greetings people who are smarter than I.
After publishing a project which utilises SQLite, when the part of the program runs that accesses the DB commands, I get this error.
Unable to load DLL 'SQLite.Interop.dll': The specified module could
not be found
Now I have spent hours, going through the many similar threads, trying all the suggestions to see if I can fix this, however as of yet I have had no luck.
I have done the following.
Ensured the SQLite.Core is included on the main project and all sub project areas.
Ensured the .dll is available in the debug bin.
Ensured dependencies are set correctly.
Publish specifically to x64 platform.
Publish specifically to x86 platform.
Disabled "Prefer 32-bit".
Copied some specific references to csproj.
All to no avail. If anyone has any experience with this who might be able to suggest something new that I haven't tried in an attempt to solve this I would be most grateful.
So after much research i finally found the solution.
It seems there are a great many potential causes for this error, however this resolved the issue for me in this instance.
Revert everything back to how it was, ensure System.Data.SQLite.Core is referenced in your assemblies.
Close VS / solution and open the csproj file in the repo. Copy the following into the file.
<PropertyGroup>
<ContentSQLiteInteropFiles>true</ContentSQLiteInteropFiles>
<CopySQLiteInteropFiles>false</CopySQLiteInteropFiles>
<CleanSQLiteInteropFiles>false</CleanSQLiteInteropFiles>
<CollectSQLiteInteropFiles>false</CollectSQLiteInteropFiles>
</PropertyGroup>
Save the file, (probably would create a copy of it beforehand to ensure you can replace it if it doesnt work for you).
Ensure that interop.dll is not anywhere in your repo except bin/debug/x86 and x64.
Then proceed to test your project, then publish it.
Reason:
Because the Interop is included in the nuget installation, but not copied down, this bit of code ensures that its copied through during the publishing.
Thank you internet.
I am working on a C# program that utilizes EntityFramework, I've cloned the program from git repo, but now it is having that dreadful Metadata file 'EntityFramework.dll' could not be found error. I have searched and tried countless suggestions for this kind of problem, but none worked. I've already checked that the reference to EntityFramework.dll in the .csproj files are correct and it is definitely there under the packages\EntityFramework.6.2.0\lib\net45\ folder. So I am not sure what else to try.
Ok, I've resolved this problem. Here is what happened. Apparently, when cloning into local directory, one of the folder on the path has a space in its name (like My DSS), and this nuget issue seems to indicate the inability of nuget to find package with space in path. So, once I changed that folder's name to MyDSS, it compiled successfully.
please have a look on the bin folder ,sometimes the dlls do not exist there .
This typically happens when teams check in files that should not be checked in (such as the .suo file) or have "optimized" their builds to exclude rarely changed projects. (unticking projects in the configuration manager.)
Another common cause for missing references is when devs reference a dependency from a /bin folder instead of the packages folder, but it sounds like you've confirmed that isn't the case.
Other questions such as Metadata file '.dll' could not be found list a number of things to check, so your problem will surely be one of these. Try building each project individually, working from projects that have no project dependencies upwards to the main application project(s). Ensure they're running the same .Net versions, check the solution NuGet packages for dependencies with "multiple versions" and consolidate these so that the solution is using a single version of each dependency. (generally good for cleaning up) Also look at .config files for version re-directs that sometimes get zombified in source control.
In Visual Studio, on top, click on Build -> Configuration Manager. Make sure that the build checkbox next to your project is checked. In case it already is, uncheck it and then make it checked again. Clean your Solution and Build it again after this.
I have C# project created in VS 2008. I have referenced another DLL to it and kept Copy Local option to true. When I am doing a first rebuild, it fails with "could not load file or assembly" message and then if I build without any changes it builds fine.
In the background, rebuild cleans bin directory and build solution file at this time refrenced DLL gets deleted so it throws exception. On next build referenced DLL remains in bin directory and project builds successfully.
Now I want to know how can I resolve issue and ensure succesful build each time.
Thanks
If the referenced DLL noes not change (for example if it's a third party component) then a neat trick for this is to change the attributes of the referenced DLL in your BIN folder to read-only and it will not be deleted by the VS Clean function.
I'm trying to debug my dll and I have the pdb file next to the dll and I still can't step into the method. What else am I missing?
The version of the assembly loaded in your application is not the version that is loaded in Visual Studio.
If both projects are in the same solution, ensure you are adding a reference by using a Project Reference rather than browsing to the /bin folder. In cases like this, you may browse to the /bin/release version, then set the Build to Debug, causing the problem you are experiencing.
If projects are in two different solutions, ensure the solution you wish to debug is cleaned and rebuilt, and then re-add the reference to the fresh assembly in the running project.
Make sure the PDB is the latest build. Also make sure the PDB is in the same folder as the EXE you are running.
As Travyguy9 mentioned make sure that you have rebuilded whole solution. Also from time to time I also can't debug and then I have to close VS and open it again.
I've got a C# project in visual studio that is building a DLL, and another console project which includes the first as a reference. These are both in the same solution.
The trouble is when I add methods to the DLL, then rebuild the console project doesn't seem to pick them up.
For example, in the DLL I have a class Converters. If I add a method
public static void test() {}
it just doesnt' show up in the console app at all. Intellisense doesn't autocomplete it, and if I manually type it in it gives a compiler error.
If I go in and delete the dll files then rebuild that works (or better yet, delete the bin and obj directories) but that seems rather drastic.
I'm sure this is a basic error, but I can't seem to find the solution after some googling.
How are you adding the reference? As a project reference or by browsing to the DLL? If you're using the latter then it will copy it locally to the bin directory of your console app and won't refresh it unless you manually delete it. If you add it as a project reference it will copy it as and when it needs to.
The exact thing happened to me once on a project - it turned out the build command wasn't configured to build these DLLs.
Check Build - Configuration Manager, and make sure the project is checked:
(Image from msdb - Setting the Build Configuration)
close Project visualStudio and
rebuild again your dll (other project visualStudio)
One of the things to note is the Target Framework of the Projects, if you compile your Project A with target framework different then that of Project B and it is referencing the dlls of Project A you may run into this kind of trouble. So, make sure that the target framework for both Projects is same.
Check that you don't have the ddl inside the bin folder of your project. Whilst I was adding the reference by browsing for the dll, I had forgotten that I manually copy pasted a version into that folder. No matter how many times I cleaned and rebuilt, it didn't seem to update.
Deleting that dll and re-referencing fixed the issue.
Change the reference to the dll to the Project, instead of the output.
This is certainly unexpected behavior. It sounds like the reference between the two projects is broken in some way. Two issues come to mind.
Possible problem with the reference. Try deleting the reference in solution explorer and readding the reference and seeing if that fixes things. When you re-add make sure it's a project reference and not a file reference.
It's possible that the time stamps on the files in your project are off. See if they are in the future.
check the folder which contains the reference. does it contain a refresh file with a relative path in it? if so, and if assembly names in the location pointed to by the relative path are common with those in of (project) references which should auto update, then these references no longer auto update! what you end up is a static reference to the assemblies present in the relative path contained in the refresh file.
you may also have to delete the projectreferences key in the sln file and add references afresh
I hate to beat a dead SO question but 8 years after the original question and none of the above solving the issue for me, my problem was in VS2013, but to solve it I simply removed and re-added the reference to the DLL in the project that invokes it.
I hope this helps some people in the newer VS realm having the same issue.